how to bleed a radiator to reduce high boiler pressure

How to reduce high Boiler pressure

Before you begin

In order to reduce high Boiler pressure caution and expertise is required, it can be hazardous if not handled properly.

If in doubt it is recommended to seek the help of a professional rather than attempting to resolve the issue yourself.

However, if you are determined to try, start by bleeding your radiators. It is advisable to have a helper assist you during the process for safety reasons.

Cooling the system down

To mitigate high pressure in your heating system, it’s important to allow it to cool down before attempting to bleed the radiators. Bleeding a radiator involves releasing excess water. It is recommended to wait four to six hours to ensure the water is as cool as possible before starting the process.

This reduces the risk of injury and ensures the bleeding process is completed safely and effectively.

Tools needed

To begin the bleeding process, you must first find the bleed key or radiator key after allowing the heating system to cool down for four to six hours.

The bleed key is a small tool that fits onto the top of the radiator to release pressure. Once you have obtained the key, you can prepare to carry out the bleeding process.

Preparing the area

Before starting the bleeding process, it’s important to protect your floor from any potential mess. Bleeding a radiator can be messy, especially if the pressure in your system is high. To safeguard your floor, place towels or a dust sheet beneath the radiator before beginning.

This simple step will prevent any damage to your floor and make cleaning up easier afterwards.

Bleeding

radiator key

To bleed the radiator, attach the bleed key to the top of the radiator and turn it slowly until you hear a hissing sound, indicating that air is being released.

Then, water will start to flow out. It’s helpful to have a small plastic container on hand to catch the water.

Get help

When you have a helper, they can stand near the pressure gauge to monitor the pressure levels during the process.

If performing the task alone, release the pressure gradually and periodically. Tighten the valve to check the gauge then repeat until the issue is resolved.

After the bleeding process

Double check the valve his properly tightened.

Verify the pressure gauge to confirm that it is within the range of one to one and a half bar.

Once you have ensured that the system pressure is correct, it is safe

Experiencing issues

Experiencing issues with your heating system, including depressurising or bleeding your radiators? We recommended to hire a Gas Safe Registered engineer.

If the problem persists even after trying the methods outlined in this article, it’s advisable to seek professional help.

If you suspect that your boiler pressure has dropped due to a water leak, it’s crucial to get help immediately.

Neglecting to do so can result in severe damage to your system and potentially affect the stability of your home. In these cases, it’s best to call in an expert.